EP1533056B1 - Cutting tool head for a metal working tool - Google Patents

Cutting tool head for a metal working tool Download PDF

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Publication number
EP1533056B1
EP1533056B1 EP04445118A EP04445118A EP1533056B1 EP 1533056 B1 EP1533056 B1 EP 1533056B1 EP 04445118 A EP04445118 A EP 04445118A EP 04445118 A EP04445118 A EP 04445118A EP 1533056 B1 EP1533056 B1 EP 1533056B1
Authority
EP
European Patent Office
Prior art keywords
insert
holder
clamping
tool head
clamping screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP04445118A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1533056A1 (en
Inventor
Per Hansson
Erik Berminge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandvik Intellectual Property AB
Original Assignee
Sandvik Intellectual Property AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sandvik Intellectual Property AB filed Critical Sandvik Intellectual Property AB
Publication of EP1533056A1 publication Critical patent/EP1533056A1/en
Application granted granted Critical
Publication of EP1533056B1 publication Critical patent/EP1533056B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/04—Tool holders for a single cutting tool
    • B23B29/043—Tool holders for a single cutting tool with cutting-off, grooving or profile cutting tools, i.e. blade- or disc-like main cutting parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/04—Cutting-off tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/04—Tool holders for a single cutting tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2205/00—Fixation of cutting inserts in holders
    • B23B2205/02—Fixation using an elastically deformable clamping member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2220/00—Details of turning, boring or drilling processes
    • B23B2220/12—Grooving
    • B23B2220/123—Producing internal grooves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
    • Y10T407/2272—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
    • Y10T407/2282—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder including tool holding clamp and clamp actuator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
    • Y10T407/2272—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
    • Y10T407/2282—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder including tool holding clamp and clamp actuator
    • Y10T407/2286—Resiliently biased clamp jaw
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
    • Y10T407/2272—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
    • Y10T407/2282—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder including tool holding clamp and clamp actuator
    • Y10T407/2286—Resiliently biased clamp jaw
    • Y10T407/2288—Integral with holder

Definitions

  • the present invention is related to a tool head of the kind intended for chip removing machining of metal.
  • the tool head comprises a basic holder and an insert holder connected therewith. More specifically, the tool is intended for the type of machining referred to as parting and grooving.
  • Swedish patent application 7813038-2 discloses a tool for parting and grooving, wherein co-operating serrations with clamping screws as clamping means are used.
  • the number of screws for clamping the adapter to the holder is three in this case, which means that the activity of first disengaging three comparatively long screws and subsequently tightening them again after an insert change has taken place results in a rather time consuming change of inserts.
  • Swedish patent application 9004032-0 discloses a cutting tool, comprising a cutting insert clamped in an insert pocket in a holder blade, wherein the cutting insert is clamped by a press means engaging in a slot, oriented at inclined angle towards the insert pocket, such that an upper clamping arm portion of the holder blade is subjected to elastic deflection and a force resulting therefrom towards the upper surface of the insert. Due to the fact that the press means is constituted by a relatively long pin, this system becomes relatively space consuming in a narrow holder blade for a parting tool.
  • DE 10149426 a tool holder providing the basis for the preamble of claim 1 is shown.
  • the object of the present invention is to provide a tool head for chip removing metal machining tools, which, in relation to previously known tools of the kind in question, has improved characteristics regarding clamping of the cutting insert and enables a more simple insert change.
  • Fig. 1 illustrates a tool head for chip removing metal machining tools according to a preferred embodiment of the present invention.
  • the tool head comprises a basic holder 1 having a central bore 9a for engagement with a tool machine.
  • the basic holder 1 has an insert holder 4 connected therewith, which is formed in the shape of a forwardly and laterally projecting portion.
  • the basic holder is intended to be connected, preferably, via an engagement part adapted to this purpose, to a tool machine, for instance a multipurpose lathe.
  • the front portion of said forwardly and laterally projecting portion is constituted by a blade-shaped portion, in which is provided an insert pocket 7 in form of a clamping slot for receiving a cutting insert 3 for chip removing machining.
  • the insert pocket 7 is formed between a lower support part 6, supporting the insert 3, and an upper clamping portion 5, formed integrally in one piece with the lower support part 6, the upper clamping portion having a smaller width than the rest of the basic holder 1.
  • the cutting insert 3 is intended to abut, with the rear end surface 3a thereof, against a shoulder 8, which limits the inward axial displacement of the cutting insert.
  • the shoulder 8 is formed projecting on the lower support part 6 of the projecting side portion 4.
  • the clamping slot 7 transforms rearwardly into a slot extension 9, extending in the longitudinal direction of the holder 1, said slot extension 9 having considerably lower slot height than the front clamping slot 7.
  • the end portion of the slot extension 9 is designated 9a.
  • the lower surface 3b of the cutting insert preferably, is oriented in a direction perpendicular to the rear part 3a of the cutting insert and that said lower surface 3b at the same time is parallel with the intended feed direction.
  • the rear part of the upper surface of the cutting insert and the lower surface 3b of the cutting insert have, preferably, been formed with concave V-shaped wedge-type grooves in the manner shown and described in the Swedish patent application 9703434-2 .
  • the basic holder is provided with a plurality of spaced-apart recesses 10a, 10b, 10c, 10d, which extend in a transverse direction in parallel with the central axis CL of the basic holder. It is intended to have three clamping screws 11b, 11c, 11d received in the bores 10b, 10c, 10d to be threadedly engaged in corresponding bores in a suitable engagement part, via which the basic holder is secured in an appurtenant machine (not shown).
  • a nut roll 11a is slidably fittingly received, the axial length of the nut roll substantially corresponding to the thickness of the basic holder 1 and the insert holder 4 integrally formed therewith.
  • the bore 15 extends radially inwards to a position, at a distance from the hole 9a, such that a hinge 17 is formed therebetween.
  • This bore 15 is intended to receive a clamping screw 19, the lower threaded portion of which being intended to be threadedly engaged in a threaded portion 21 of the nut roll 11a.
  • the tool head 1 also has a laterally extending slot 20 in connection with the recess 10a, the slot 20 being separate from the insert pocket 7.
  • the slot 20 extends laterally all the way through the head, whilst extending centrally through the bore 15. From Fig. 1 also appears that the insert receiving clamping slot 7 extends laterally through the basic holder 1 as well as the insert holder 4.
  • the nut roll 11a Upon threadedly engaging the clamping screw 19, which is received in the bore 15 of the basic holder 1, in the nut roll 11a and tightening of the clamping screw 19, the nut roll 11a is adapted to be imparted movement in the axial direction of the clamping screw radially outwards, such that the nut roll is displaced into the slot 20.
  • the upper clamping portion 5 comes to clamping engagement with the upper surface of the cutting insert 3 and, accordingly, the cutting insert 3 is clamped in the insert pocket 7.
  • the nut roll 11a is formed substantially cylindrical, at the same time as the recess 10a adapted to receive the nut roll is formed eccentric, i. e. formed with a shape differing from the circular shape, for instance an oval shape.
  • the eccentric design is in Fig. 1 illustrated by the eccentric portion 24, which has a curved shape differing from the circular shape.
  • the recess 10a is formed such that the internal periphery thereof has a tapering shape in a direction towards the slot 20, for instance a conventional wedge shape, which enables the nut roll 11a to be displaced into the slot 20 upon tightening of the clamping screw 19.
  • the recess 10a is formed cylindrical.
  • the nut roll 11a is, preferably, formed externally with a wedge shape. This embodiment enables, in conformity with the embodiment of the invention illustrated in Fig. 1 , displacement of the nut roll 11a into the slot 20 upon tightening of the clamping screw, such that the upper clamping portion of the insert holder 4 is deflected and clamps the cutting insert 3 in the insert pocket.
  • Fig. 2 illustrates a further embodiment of the invention, in which the recess 10a adapted to receive the nut roll is formed eccentric at the same time as the nut roll 11a is formed externally with a wedge shape. It is also conceivable to form the nut roll 11 a externally with another shape tapering towards the slot, for instance a convexly curved surface.
  • This combination of design of the recess 10a and the nut roll 11a, respectively, enables, in an advantageous way, the inventional movement of the nut roll in the axial direction of the clamping screw radially outwards.
  • the clamping screw 19 is further adapted to co-operate with a fitting element 22 suited for this purpose, the upper surface of which having a plane contour and the lower surface thereof having a convexly curved contour.
  • the fitting element 22 has a cylindrical through hole for receiving the clamping screw, the through hole having a diameter smaller than the diameter of the head 18 of the clamping screw 19.
  • the clamping screw is rotatable inserted through the through hole of the fitting element.
  • the bore 15 of the basic holder ends with a recess 23, which has a contour substantially corresponding to the contour of the lower surface of the fitting element 22.
  • the fitting element 22 is adapted to abut against the recess 23, while the clamping screw is freely rotatable for tightening, when inserted through the through hole of the fitting element, the fitting element not rotating during said tightening.
  • the clamping screw 19 is provided with a conical head 18, at the same time as the upper part of the bore 15 ends with an outwardly open conical recess 16.
  • the clamping screw 19 will be displaced, upon tightening, with the conical head 18 thereof into the slot 20, which contributes to the deflection of the upper portion of the insert holder 4 and, accordingly, contributes to the clamping of the cutting insert 3 in the insert pocket 7.
  • the clamping of the cutting insert is accomplished by tightening the clamping screw 19, the movement of the nut roll 11a in the axial direction of the clamping screw towards the screw head 18 widening the slot 20 and deflecting the upper clamping portion 5 of the insert holder 4 into locking co-operation with the upper surface of the cutting insert 3.
  • this clamping screw 19 has to be unscrewed a little, whereby the nut roll 11a moves in the axial direction of the clamping screw 19 in a direction away from the head 18 and the width of the slot regains the smaller slot width, defined by the relaxed position, such that the cutting insert 3 can be exchanged, without having to disengage the screw 19 totally.
  • the screw receiving recess 15 should have a longitudinal extension in a direction, which forms an angle of 25-105° in relation to the longitudinal direction of the insert pocket. Preferably, this angle amounts to ca 35-90° in order to obtain an optimal momentum lever in relation to the hinge 17.
  • the basic holder 1 should, preferably, have a width, which is several times the width of the insert receiving portion 4, which constitutes the cutting insert carrying holder portion.
  • the longitudinal extension of the cutting insert 3 should at the same time be larger than the longitudinal extension of the lower support surface 4a in the insert holder 4, which is apparent from figs. 1-2 , such that the cutting insert 3 obtains a lateral support from the basic holder.
  • a tool head in the form of a disc-shaped milling cutter for slitting operations, having a plurality of circumferentially spaced-apart cutting inserts, each being clamped in a respective insert pocket in the manner described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Milling Processes (AREA)
EP04445118A 2003-11-19 2004-11-17 Cutting tool head for a metal working tool Not-in-force EP1533056B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0303077A SE526536C2 (sv) 2003-11-19 2003-11-19 Verktygshuvud med spännanordning i form av en mutterrulle verkande i en slits
SE0303077 2003-11-19

Publications (2)

Publication Number Publication Date
EP1533056A1 EP1533056A1 (en) 2005-05-25
EP1533056B1 true EP1533056B1 (en) 2008-02-27

Family

ID=29729101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04445118A Not-in-force EP1533056B1 (en) 2003-11-19 2004-11-17 Cutting tool head for a metal working tool

Country Status (7)

Country Link
US (1) US7264424B2 (sv)
EP (1) EP1533056B1 (sv)
KR (1) KR101202224B1 (sv)
CN (1) CN100478126C (sv)
AT (1) ATE387277T1 (sv)
DE (1) DE602004012045T2 (sv)
SE (1) SE526536C2 (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104093512A (zh) * 2012-02-02 2014-10-08 伊斯卡有限公司 工具保持器以及用于在其内夹持切削刀片的方法

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SE525462C2 (sv) * 2002-06-18 2005-02-22 Sandvik Ab Verktygshuvud för spånavskiljande metallbearbetningsverktyg med spännskruv vilken ingängas i en mutterrulle
DE102006059717A1 (de) 2006-12-18 2008-06-19 Kennametal Inc. Werkzeughalter, insbesondere für ein Stechwerkzeug sowie Schneidkörper für einen Werkzeughalter
AT505360B1 (de) * 2007-05-24 2011-09-15 Boehlerit Gmbh & Co Kg Schneidwerkzeug mit lösbar befestigten schneidplatten
US8882404B2 (en) 2009-02-27 2014-11-11 No Screw Ltd Cutting tool, cutting tool holder and cutting insert therefor
DE102011078445A1 (de) * 2011-06-30 2013-01-03 Wto Werkzeug-Einrichtungen Gmbh Werkzeugträger mit auswechselbaren Werkzeughaltern und Werkzeughalter
US8985913B2 (en) * 2012-11-13 2015-03-24 Iscar, Ltd. Cutting tool holder with internal coolant passage having a compressible member
DE102012111240A1 (de) * 2012-11-21 2014-05-22 Hartmetall-Werkzeugfabrik Paul Horn Gmbh Spanabhebendes Werkzeug
AU2014316638B2 (en) 2013-09-03 2018-01-18 No Screw Ltd. Mounting mechanism for a cutting insert, a cutting insert therefor and a cutting tool using said insert
DE102014100483B4 (de) * 2014-01-16 2016-12-08 Kennametal Inc. Kassette für Schneideinsatz
US10307833B2 (en) 2015-02-04 2019-06-04 No Screw Ltd. Cutting tool comprising a cutting tool holder and a cutting insert therefor
WO2016174663A1 (en) 2015-04-30 2016-11-03 No Screw Ltd. Dynamic clamping mechanism
CN105033678B (zh) * 2015-08-04 2017-03-29 成都银河动力有限公司 一种加工活塞环槽的刀盒夹具
KR20170082020A (ko) * 2016-01-05 2017-07-13 대구텍 유한회사 회전 절삭 공구
EP3231541B1 (en) * 2016-04-14 2021-08-04 Sandvik Intellectual Property AB A face grooving tool body for metal cutting
DE102016109327A1 (de) * 2016-05-20 2017-11-23 Hartmetall-Werkzeugfabrik Paul Horn Gmbh Halter für ein Werkzeug zur spanenden Bearbeitung, insbesondere für ein Langdrehwerkzeug
CN106583773B (zh) * 2016-12-23 2018-10-19 盐城工学院 一种通用型内孔切削工具
US11433461B2 (en) 2020-06-23 2022-09-06 Iscar, Ltd. Tool adaptor having an insert receiving pocket and a fastening bore, and cutting tool assembly

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104093512A (zh) * 2012-02-02 2014-10-08 伊斯卡有限公司 工具保持器以及用于在其内夹持切削刀片的方法
CN104093512B (zh) * 2012-02-02 2017-03-22 伊斯卡有限公司 工具保持器以及用于在其内夹持切削刀片的方法

Also Published As

Publication number Publication date
DE602004012045D1 (de) 2008-04-10
KR20050048535A (ko) 2005-05-24
KR101202224B1 (ko) 2012-11-16
SE0303077L (sv) 2005-05-20
US20050180824A1 (en) 2005-08-18
EP1533056A1 (en) 2005-05-25
SE526536C2 (sv) 2005-10-04
US7264424B2 (en) 2007-09-04
DE602004012045T2 (de) 2009-02-26
ATE387277T1 (de) 2008-03-15
CN1623725A (zh) 2005-06-08
CN100478126C (zh) 2009-04-15
SE0303077D0 (sv) 2003-11-19

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